If you search with google "China Coronavirus lies" it'd appear a lot of people question China. That is a pretty biased search term though.
Of course there are enough people in the world that, finally joined together by the Internet, there is a not insignificant quantity of resources on the same devoted to the belief that the earth is flat, the Illuminati are real and control the world, and so on. There are enough people who believe that China exists wholly to make America/the Wests's lives miserable that it's just plain natural that there's a lot of conspiracy flying about around China.
The truth is, as always, subtler. China, without a doubt, have a history of producing propaganda and controlling what appears in the media for political/appearance reasons both for domestic and foreign consumption. To be clear, the West does this too perhaps not to the same extent but we definitely do do it; it's just that it's 'our little tribe' so we don't see it clearly for what it is. Doing this has a knock on effect that you start to believe your own propaganda and model your world view on it - it becomes self-reinforcing. The Chinese variety is compounded by a deep rooted cultural attitude towards 'saving face', an attitude that exists but isn't as deep or widespread in the West except notably in certain political figures.
There is evidence that there was a knee jerk "don't accept bad news, it couldn't happen here in our wonderful society" reaction in China to the initial reports of a starting Coronavirus epidemic. The doctor who first reported the likely epidemic was given a hard time. Unusually sense and respect for actual evidence quickly prevailed, the doctor was exonerated the people who had tried to suppress the "bad news" given an arse kicking instead. Chinese officialdom overcame their "no bad news here" conditioning and prioritised responding appropriately over propaganda. They accepted that this was a situation where facts trump ideology.
It's that about turn that makes it unlikely that China have gone back into propaganda mode over reporting coronavirus related statistics. At this point sense says that there isn't any political mileage in falsifying the statistics. Once they made the step to publicly acknowledge that a big problem existed they stepped past the point where there was any face to be saved, and indeed now the way to keep face is to be able to demonstrate that they are being open handed about this.